Abstract
Theoretical and experimental investigations were made of the frequency of relaxation oscillations and of the operational dynamics of a solid-state ring laser when the frequency of self-modulation oscillations was varied within a wide range by altering one of the feedback coefficients of counterpropagating waves. The generally accepted formula for the relaxation frequency ωr = [(ω/Q) η/T1]1/2 is valid only in the limited range of self-modulation oscillation frequencies; here, (ω/Q) is the cavity bandwidth, η is the excess above the pumping threshold, and T1 is the relaxation time of the population inversion. A strong interdependence of the frequencies of self-modulation and relaxation oscillations, as well as mutual locking of these frequencies in the region of a parametric resonance were observed. Period doubling of self-modulation oscillations and dynamic chaos were investigated in the region of a parametric resonance between self-modulation and relaxation oscillations.
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